It's a natural question. Three hundred pages is substantial. I worked on Chapter 7 by far the longest. My curiosity about labor/management struggles at Magma Copper Company got the best of me. And well it should because I've known so many individuals - some are close friends - who lived the experience themselves.
That chapter took several months to write from start to finish. I had to research it, including with three of the principals, because I had only bits and pieces of memory to fall back on. One that I thought was indelible - a labor rally half a block from our Oracle home - turned out by a couple of years to have happened later than I first thought. Much of the story might qualify as "original research", based as it was on recollections of participants in key events, including several not reported in the media.
If you read Sometimes David Wins, you'll see how my family history connects directly with Chapter 7's storyline. And there's a lot more to it for me - living next door to the largest underground copper mine in the country, experiencing the pluses and minuses of that proximity, identifying with both labor and management at different points and spending much time in nearby San Manuel during its heyday. San Manuel, built from the ground up by Del Webb at the behest of Magma Copper Company, lays claim to being the last true company town constructed in the USA.